A Complete Analysis of Common Disease Prevention and Control Methods for Asarum

Asarum is a relatively valuable medicinal herb. With growing demand and the development of under-forest economies, its artificial cultivation has developed rapidly, and the planting area is becoming larger and larger, making it one of the main economic industries in many rural areas. Although asarum is a medicinal herb, it still suffers from diseases during cultivation. When diseases are severe, they can deal a devastating blow and affect the development of asarum production. Below, the editor brings several common disease prevention and control methods for asarum. Let's take a look together.

1. Asarum Phytophthora blight

Phytophthora blight mainly harms the leaves and petioles of asarum. When the disease occurs, water-soaked dark green round lesions appear on the leaves. When humidity is high, a large amount of white mold-like substance appears on the lesions. Under high temperature and high humidity conditions, this disease spreads at an extremely fast rate, ultimately causing the petioles to soften and fall over, and the leaves to rot and die.

Prevention and control methods: Practice reasonable crop rotation, strengthen ventilation and drainage measures during planting, and promptly remove diseased leaves after they appear. If localized infection occurs, spray 600 times diluted amobam solution or 75% chlorothalonil 600 times diluted solution for control.

2. Asarum rust disease

Rust disease also harms leaves and petioles, and some also harms flowers and fruits. It is a bacterial disease. The pathogen spores parasitize on the leaves. In the early stage, mound-like raised areas appear on the leaf surface. In the later stage, the spores rupture, and a large amount of white powder appears. As the disease develops, it turns yellow-brown and chestnut-brown. In color it somewhat resembles iron rust. When the disease is severe, the leaves completely wither and die.

Prevention and control methods: In autumn, thoroughly clean the garden, pull out diseased and remnant plants, take them out of the field and burn them, which can reduce the pathogen. When the disease occurs, remove the diseased leaves, and also spray fungicides such as triadimefon and sodium dimethyldithiocarbamate for control.

3. Asarum damping-off disease

Damping-off mainly harms the base of the stem. The pathogen invades the young stem and continuously spreads along the stem. After the stem base is infected, yellow-brown lesions appear, ultimately causing the stem base to rot. Because the transport tissues are cut off, the plant gradually wilts and dies.

Prevention and control methods: Practice reasonable crop rotation. After the autumn harvest, deep-plow diseased and remnant plants into the soil. During the rainy season, open ditches in time for drainage to reduce field humidity. At the same time, prevent high temperature and strong light exposure to avoid sunscald wounds, which would give the pathogen an opportunity. When the disease occurs, spray 2000 times diluted hymexazol or 15% damping-offling emulsion 500-1000 times diluted solution to drench the soil for treatment.

4. Asarum leaf blight

Leaf blight mainly harms the leaves, and also harms the petioles, flowers and fruits. When leaves are infected, round lesions appear, and the lesions have obvious concentric rings, appearing light brown or brown. When the disease is severe, the lesions merge and perforate, causing the leaves to wither and die. When petioles are infected, spindle-shaped black lesions appear, and the lesions are sunken. The lesions on flowers and fruits are round and dark brown. Under high temperature and high humidity, brown mold-like substance is produced.

Prevention and control methods: Clean the garden in autumn, promptly pull out and burn diseased plants, then spray mancozeb or copper sulfate for disinfection. In the early stage of the disease, spray iprodione and procymidone for control.

The above are common disease prevention and control methods for asarum. We hope this can help you. If you want to learn more about medicinal herb cultivation knowledge, please stay tuned to us.